Orion-M
CONFIGURING THE UDC2500/3200 CONTROLLER
FDC Orion-M
3.3
3.2.2
Input 2 Operation
Input 2 of the UDC2500/3200 can be used as monitor inputs to the Orion-M. When Loop 2 Input is selected
as the monitor input type in the Orion-M Configurator, the Orion-M will display the second input of selected
loop controls as monitor inputs.
The Loop Input 2 monitor point selection allows inputs to be displayed on the Orion-M with a resolution of 0 to
3 decimal points. The Orion-M has a display range of -32768 to 32767, -3276.8 to 3276.7, -327.68 to 327.67
or -32.768 to 32.767 depending upon decimal point selection. When selecting the decimal point resolution for
the monitor point input in the Orion-M Configurator, make sure that range of the UDC2500/3200 does not
exceed the range selected in the Orion-M or the value may not be displayed correctly.
If input 2 of the UDC controller is a temperature value, its temperature units must match that of the selection
in the Orion-M. If the selections do not match, the Orion-M may show units of degrees Centigrade while the
actual value from the UDC control is in degrees Fahrenheit. Be sure that all temperature inputs to all UDC
controllers match the temperature units selection on the Degrees C/F screen on the Orion-M.
When using the second input of control loops for monitor points, it is important to note that the controller itself,
provides range, calibration and input bias settings for the input. The ‘Monitor Input Offset’ screen in the
Orion-M runtime application allows an offset to be applied to the monitor points when input 2 of the loop
controls are used. However, the input offset of the Orion-M only corrects the value shown on the Orion-M and
does not offset the reading in the loop control.
If the loop control is visible to the operator, it is recommended that the ‘Monitor Input Offset’ screen be hidden
(see Section 3.6 Orion Functions/Startup View in the Orion-M Configuration Manual) or even password
protected in the runtime application to prevent an offset from being applied to the monitor point in the Orion-
M. Rather, use the input bias setting of the loop control so that both the reading on the loop control and the
Orion-m will match to avoid operator confusion.
3.3 Control Output Assignments
The Orion-M uses a default resolution of 1 decimal point to display the percentage of output of all UDC
controllers attached to the system. Therefore, regardless of the display resolution set on the UDC2500/3200,
the Orion-M will display a percentage of output of 0.0 – 100.0% for the output.
If the UDC controller is set for bimodal operation (heat/cool), a display value of 50.0% indicates that both heat
and cool outputs are off. Values from 50.0 to 100.0% represent the percentage of heat output from off to full
on and values from 50.0 to 0.0% represent the percentage of cool output from off to full on.
3.3.1
Auto-Tune and Auto/Manual Operation
The Orion-M provides the ability to switch each UDC2500/3200 in the system between auto and manual
output operation. This function is accessed from the Orion-M runtime, Single Loop View screen via the ‘AM’
control button.
The Orion-M cannot initiate the tune functions on the UDC2500 or UDC3200 controller. Pressing the ‘AT’
button on the Single Loop View screen in the Orion-M runtime will provide the appearance that it will activate
the auto-tune on the control, but once initiated, it will immediately turn off. Attempting to activate the auto-
tune function will not cause any malfunction or system error; however, it should be noted that the function is
inoperative when using the UDC2500/3200 control. Auto-tune must be manually initiated at the UDC
controller itself if the function is required.
Summary of Contents for Orion-M
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